Temperature Calibration Service

Process Parameters offers a highly competitive laboratory temperature calibration service traceable to National Standards. We provide a highly flexible service and aim to have your sensors and instrumentation back with you as quickly as possible whilst offering the best possible prices. We can calibrate sensor manufactured by us or by other manufacturers and offer free reminders that recalibration is due.

Temperature Probe Calibration

All temperature probes are calibrated in our high quality fluid baths which provides the best possible stability and uniformity for temperature calibration. We use high accuracy reference probes and thermometers which are calibrated regularly by external UKAS accredited laboratories.

  • Temperature range -25 to +200°C.
  • Custom points – you choose the temperature we calibrate at.
  • We calibrate Thermocouples, RTDs, Thermistors, Dial Thermometer Gauges, Temperature Transmitters.
  • We can measure all thermocouple types.
  • All RTD types including Pt100 and Pt1000. 2, 3 or 4 wire. All standard resistance coefficients.
  • Process signals including 4-20mA and voltages.
  • Coming soon – increased range to 1100°C.
Chamber controlled

For sensors where it is not possible to immerse the sensor in a fluid, we also have a temperature controlled chamber in which we can calibrate.

Isolated or complete system calibration

We can calibrate sensors on their own or we can also calibrate a complete system whether this includes an indicator, temperature controller or data logger. Call us to discuss your requirements and how we can help.

Infrared Temperature Sensor Calibration

As an Optris Centre of Excellence we have invested heavily in supporting the range of Optris Infrared Temperature Sensors that we offer. This not only includes our technical expertise with the product range but also enables us to calibrate many of the products in house with our own calibration facility.

  • Black body temperature sources from ambient to 400°C.
  • Custom points – you choose the temperature we calibrate at.
  • Independently calibrated reference pyrometers by German PTB.
  • Optical geometry carefully controller during calibration to ensure utmost precision.
  • Support full range of outputs as required including mA, Voltage and thermocouple outputs. We can also support Optris USB interfaces and CompactConnect software directly.
  • Calibrate other manufacturers infrared temperature sensors including Raytek, Land, Omega, Calex, DIAS and more.
  • Coming soon – in house calibration to 1100°C.

What is Temperature Calibration?

Temperature calibration is a process by which the customers sensor is tested under laboratory conditions against a reference measurement system which has a known accuracy at various measurement temperatures.

Immersed in fluid

Both sensors are immersed in the calibration fluid and the temperature allowed to stabilise. Once this has happened measurements from each are taken and reported to the customer in the form of a certificate. To identify the sensor a serial number and calibration certificate number are issued which are unique to that sensor or measurement system.

Measurement accuracy

If the instrument being calibrated is a simple temperature probe such as a thermocouple or RTD then the temperature errors are reported on the certificate and the customer will use this data within their measurement system to improve measurement accuracy. If we are calibrating a complete measurement system (ie. sensor plus measuring instrument) we can apply the measurement data and adjust the instrument to improve or eliminate any measurement inaccuracies.


All certificates refer back to the calibration equipment used and the certificate of calibration that were relevant at the time of calibration. We also record the ambient temperature at time of test and of course the certificate is signed off by us as a true record of the calibration procedure.

Traceable to National Standards

The service we offer is Traceable to National Standards. This means we are not an accredited laboratory, often referred to as UKAs laboratory. As a company we operate an independently accredited quality management system to ISO9001:2015 and our calibration procedures operate within this. Whilst we accept that there are plenty of cases where a UKAS calibration is necessary, we also believe that many applications can benefit from a more competitively priced traceable calibration.

Regular calibration

Temperature calibration is usually carried out at regular intervals depending on the application but most commonly on an annual basis. Under some conditions temperature sensors can suffer from drift so it is necessary to monitor the accuracy of the system over time. We can help with planning for regular re-calibration by provided free of charge reminders that this is due. Just let us know your requirements.